current ratings - do you know?

[V8 Vum]

Well, managed to rekindle a bit of enthusiasm to get wiring my dash this weekend after many weeks of procrastination due to the crazy-cold weather.

Amazing how much you forget when you have a big break from doing this stuff, and takes hrs staring at all you have previously done to figure out where get started!

I am changing many of the switches to suit my dash arrangement, and also whilst I have a chance, stripping out much of the redundant wiring to make the dash loom a bit neater and less bulky.

...and so to my question,

Does anyone know the max current consumed by the factory fuel change-over valve feed switch when activated?

I have managed to source a 'special' duel circuit savage switch unit which is not normally for sale (apparently, so they tell me)that will allow me to have a push latch mechanism, where in the 'off' unlatched position, feed is connected from one fuel sensor......
..... and when latched, the led is activated, the tank level indicator is switched, and the fuel valve is energised, thus I can ditch the original toggle 3 position switch for something much neater!

From memory the white wire from the ign switch to toggle switch is massive! Does it need to be so heavy?

And so, I just wanted to double-check to see what amperage is likely to flow through the switch as savage switched have a max rating of 10 amps?


cheers

Keith

[02PRUV]

This might be a stupid idea cause I haven't got my kit yet, but if the valve draws a lot of current wouldn't it be switched through a relay. And if it isn't and there is lots of current going through the switch and your new switch can't do that then you could always put a relay in yourself for it.

[spatz]

V8 Vum said:

Does anyone know the max current consumed by the factory fuel change-over valve feed switch when activated?

I have managed to source a 'special' duel circuit savage switch unit which is not normally for sale (apparently, so they tell me)that will allow me to have a push latch mechanism, where in the 'off' unlatched position, feed is connected from one fuel sensor......
..... and when latched, the led is activated, the tank level indicator is switched, and the fuel valve is energised, thus I can ditch the original toggle 3 position switch for something much neater!

From memory the white wire from the ign switch to toggle switch is massive! Does it need to be so heavy?

And so, I just wanted to double-check to see what amperage is likely to flow through the switch as savage switched have a max rating of 10 amps?


cheers

Keith

here the link to the pollak valve which I think is what the factory is using.

http://www.biotuning.co.uk/images/Selector%20Valve...

This valve is only consuming power when activated, a good indicator is that it needs a reverse voltage to disengage.
The spec sheet does only say you need a 10amp fuse, but I cannt imagine that this simple small motor can eat more than 1 amp when activated.

[Steve_D]

The white is that size because it is powering the low pressure pumps. Not sure where they power the high pressure pumps from. I assume it is powered via the separate efi loom.

Steve

[V8 Vum]

Of course Steve, forgot that!
Now since I don't use the LP pumps that way it only supplies the valve, so sounds like the switch will cope then!

[spatz]

Steve_D said:

The white is that size because it is powering the low pressure pumps. Not sure where they power the high pressure pumps from. I assume it is powered via the separate efi loom.

Steve

Standard loom is missing some cables for the fuel system for EFI, the high pressure pump is easily taking up to 20 amp so the wire should cope with that and so the fuse. Since the fuel pumps are usually engaged by the ECU, a relay is also necessary. e.g DTA ECU is loading the fuel system with pressure when ignited and after 3s shuts the pumps off to revive them when the engine is running.

[V8 Vum]

Happy and (hopefully) more prosperous New Year to all peeps on here!

I for one, have crossed all my fingers and toes!

Next question:

Reference the LS7 ECM circuits......Does anyone know what max current is drawn on the feed to:

1. the permanent live circuit?
2. the switched live circuit?

Thanks...

Keith

Edited by V8 Vum on Tuesday 4th January 08:44